1 Noteworthy changes in release ?.?
2 =================================
4 Noteworthy changes in release 4.7
5 =================================
8 * strace no longer suspends waitpid until there is a child
9 for waitpid'ing process to collect status from.
10 * strace no longer detaches from a tracee which is supposed
12 * strace now issues a new message: "+++ exited with EXITCODE +++"
13 which shows exact moment strace got exit notification,
14 analogous to existing "+++ killed by SIG +++" message.
17 * Added x32 personality support (x86_64 architecture).
18 * Added -y and -P options to print file descriptor paths and
19 filter by those paths.
20 * Added -I option to control strace interactivity.
21 * Allowed -p option to take comma or whitespace-separated list of PIDs.
22 * Added strace_log_merge script helper to merge timestamped "strace -ff"
24 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
25 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
26 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
27 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
28 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
29 listxattr, setrlimit and swapon syscalls.
30 * Implemented decoding of loop and mtd ioctls.
31 * Added syscall entries for new linux syscalls.
32 * Added syscall entries for direct socket system calls on powerpc.
33 * Updated the list of errno constants.
34 * Updated lists of MSG_*, STA_*, and TCP_* constants.
35 * Regenerated the list of ioctl names from Linux 3.3.
36 * Enhanced switching between processes with different personalities.
37 * Enhanced signals reporting by using short signal names.
38 * Made ERESTART* messages more descriptive.
39 * Made parsing of numbers from strings more robust.
40 * Added support for compat_statfs64 and statfs64.f_flags.
41 * Changed read of data blocks to use single process_vm_readv syscall
42 (when available) instead of several PTRACE_PEEKDATA operations.
43 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
44 operation instead of several PTRACE_PEEKUSER operations.
45 * Applied various optimizations to make strace work faster.
48 * Implemented proper handling of real SIGTRAPs on kernels supporting
49 PTRACE_O_TRACESYSGOOD.
50 (Addresses Fedora bug #162774).
51 * Fixed sockaddr_un.sun_path name in decoded output.
52 (Addresses Debian bug #554946).
53 * Fixed to avoid potential core file clobbering on exit.
54 (Addresses Debian bug #656398).
55 * Fixed a typo in documentation.
56 (Addresses Debian bug #653309).
57 * Fixed decoding of timer id returned by timer_create.
58 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
59 * Fixed *at syscalls flags decoding.
60 * Fixed ARM EABI 64-bit syscall's arguments decoding.
61 * Fixed semtimedop decoding on s390.
62 * Fixed osf_sigprocmask decoding on alpha.
63 * Fixed ipc and socket subcall decoding on several architectures.
64 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
65 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
66 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
67 * Corrected io_* syscall entries on ARM.
68 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
69 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
70 * Fixed build when libaio-devel is not available.
71 * Fixed configure checks for PTRACE_* constants.
72 * Fixed compilation warnings remained on several architectures.
75 * Removed all non-Linux code. After years of neglect, that dead code
76 just hampered further strace development.
77 * Linux kernel >= 2.6.18 is recommended. Older versions might still
78 work but they haven't been thoroughly tested with this release.
80 Noteworthy changes in release 4.6
81 =================================
84 * Print diagnostic information about changes in personality mode to
85 standard error instead of standard output.
88 * Implemented a new method of following clone, fork, and vfork
89 syscalls using the Linux kernel's explicit facilities for tracing
90 creation of threads and child processes.
91 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
92 * Implemented decoding of TLS syscalls on m68k.
93 * Implemented biarch support on powerpc64.
94 * Implemented biarch support for getrlimit() and setrlimit().
95 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
96 * Implemented SOL_SCTP socket options decoding.
97 * Added HDIO_* ioctl names.
98 (Addresses Debian bug #450953).
99 * Added LOOP_* ioctl names.
100 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
101 to match Linux 2.6.37.
102 * Updated the list of IPPROTO_* constants to match netinet/in.h.
103 * Implemented decoding of HDIO_* and BLK* ioctls.
104 * Added MicroBlaze architecture support.
105 * Added new syscall entries to match Linux 2.6.37.
106 * Regenerated list of ioctl names from Linux 2.6.37.
107 * Enhanced signal notification decoding.
108 * Documented -C and -D options.
111 * Fixed fetching syscall arguments on m68k.
112 * Fixed an error when judging whether a process has children.
113 * Fixed get/set_robust_list syscall numbers for powerpc.
114 * Fixed a corner case in printing clone flags.
115 * Fixed cross-compiling issues.
116 * Fixed build issues on powerpc64, SH and SPARC.
117 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
118 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
119 fanotify_init, and fanotify_mark syscalls.
120 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
121 * Fixed biarch support in IO dumping.
122 * Fixed raw exit_group decoding.
123 * Fixed decoding of file descriptors on 64-bit architectures.
124 * Fixed a corner case in waitpid handling.
125 (Addresses Red Hat bug #663547).
126 * Fixed stat64 decoding on mips
127 (Addresses Debian bug #599028).
128 * Fixed misleading italics in the manual page.
129 (Addresses Debian bug #589323).
131 Noteworthy changes in release 4.5.20
132 ====================================
135 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
136 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
137 rt_tgsigqueueinfo, perf_event_open.
138 * Enhanced decoding of recently added syscalls on non-x86 architectures
139 by replacing a bare decoder with elaborate parsers enabled earlier
141 * Implemented -C option to combine regular and -c output.
142 (Addresses Debian bug #466196)
143 * Enhanced decoding of mbind and mremap syscalls.
144 * Enhanced SOL_PACKET socket options decoding.
145 * Regenerated list of ioctl names from linux 2.6.33.
146 * Added TILE architecture support.
149 * Fixed build with Linux kernel headers 2.6.32-rc5+.
150 (Addresses Debian bug #560516 and Fedora bug #539044)
151 * Fixed build on mips.
152 * Fixed handling of Linux systems without struct statfs64.
153 * Fixed reporting signal mask by sigreturn on powerpc.
154 * Fixed potential stack buffer overflow in select decoder.
155 (Addresses Fedora bug #556678)
156 * Corrected msgsnd indirect ipccall decoding.
157 * Corrected decoding of 64bit syscalls.
158 (Addresses Debian bug #570603)
159 * Corrected getsockopt decoding on architectures where
160 sizeof(long) > sizeof(int).
161 (Addresses Debian bug #494844)
162 * Corrected decoding of epoll_pwait.
163 (Addresses Debian bug #513014)
164 * Corrected handling of killed threads.
166 Noteworthy changes in release 4.5.19
167 ====================================
169 * Changes in behavior
170 * When command exits, strace now exits with the same exit status.
171 If command is terminated by a signal, strace terminates itself
172 with the same signal, so that strace can be used as a wrapper
173 process transparent to the invoking parent process.
174 When using -p option, the exit status of strace is zero unless
175 there was an unexpected error in doing the tracing.
176 (Addresses Fedora bug #105371 and Debian bug #37665)
179 * Implemented decoding of new Linux syscalls: accept4, dup3,
180 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
181 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
182 * Implemented decoding of accept4 socketcall.
183 * Enhanced prctl decoding.
184 * Enhanced nanosleep decoding.
185 * Enhanced ptrace decoding.
186 * Enhanced futex decoding.
187 * Enhanced CAP_* decoding.
188 * Enhanced SIOCS* ioctls decoding.
189 * Enhanced fcntl F_* flags decoding.
190 * Enhanced semop/semtimedop decoding.
191 * Updated ARM architecture support.
192 * Added Blackfin architecture support.
193 * Added AVR32 architecture support.
194 * Added CRIS architecture support.
195 * Made strace detect when traced process suddenly disappeared.
198 * Fixed syscall numbers for tee and sync_file_range.
199 (Addresses Debian bug #503124)
200 * Fixed several bugs in strings decoder, including potential heap
202 (Addresses Fedora bugs #470529, #478324 and #511035)
203 * Marked sendfile(2) as a network syscall.
204 (Addresses Debian bug #509499)
205 * Fixed accept(2) decoding.
206 (Addresses Debian bug #507573)
207 * Fixed sigtimedwait(2) decoding.
208 * Fixed build on ARM EABI.
209 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
210 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
211 (Addresses Red Hat bug #471169)
212 * Fixed display of 32-bit argv array on 64-bit architectures.
213 (Addresses Fedora bug #519480)
214 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
215 * Fixed HPPA architecture support.
216 (Addresses Debian bugs #437928 and #546619)
221 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
222 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
227 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
228 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
229 * Improved output for prctl system call on Linux.
230 * Improved support for Linux/ARM.
231 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
236 * Improved output for delete_module, futex, and mbind system calls on Linux.
237 * Improved output for SG_IO ioctls on Linux.
238 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
239 eventfd, getcpu, epoll_pwait.
244 * Several biarch improvements.
245 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
246 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
251 * Accept numeric system calls in -e.
256 * Introduce "-e trace=desc".
261 * Better x86-64 support for IA32 processes.
262 * Update PowerPC system calls.
263 * Better printing for Linux aio system calls.
267 * Quick fix release for build issues.
268 * One fix for Linux/ARM system call table.
273 * Print fault address for SIGSEGV/SIGBUS signals when available.
278 * Improve socket ioctl printing.
279 * Update Linux/IA64 syscall list.
280 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
281 * Improve mount flags printing.
282 * Support symbolic printing of x86_64 arch_prctl parameters.
287 * Update syscall tables for Alpha, ARM, HPPA.
288 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
289 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
290 * Improve ioctl command name matching.
291 * Print RTC_* ioctl structure contents.
292 * Support newer RLIMIT_* values.
293 * Print struct cmsghdr details in sendmsg.
298 * Print attribute values in *xattr system calls on Linux.
299 * Include pread and pwrite calls in -e read and -e write tracing.
300 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
301 * Print clock_t values symbolically in Linux clock_* system calls.
305 * Bug fixes, Linux ioctl updates.
306 * David Miller contributed support for Linux/SPARC64.
314 * Update Linux ioctl lists.
315 * Update PF_* and AF_* value lists.
316 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
321 * On Linux using NPTL threads, -p will now attach to all threads in a process.
322 * Handle new mq_* system calls in Linux 2.6.6 and later.
327 * Report some new VM_* bit values on Linux.
328 * Better output for Linux sched_* system calls.
333 * Display multiple ioctl name matches on Linux.
337 * New port to AMD's x86-64 architecture. One strace binary can
338 handle both new x86-64 and old i386 processes.
339 * Fixed support for LFS64 calls.
340 * New switch -E to add/remove environment variables for the command.
341 * Merged s390/s390x port.
342 * Trace an unbounded number of processes.
343 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
344 * Fixed bugs with attach/detach leaving things stopped.
345 * Fixed traced process seeing ECHILD despite live, traced children
346 in waitpid calls with WNOHANG.
347 * Stuart Menefy contributed a port to Linux/SH.
348 * Stephen Thomas contributed a port to Linux/SH64.
349 * Many other bug fixes.
353 * Fix Linux/ia64 support, looks like someone renamed a few things on us
354 * Fix the ioctl setup for Linux, turned out it did not really work.
355 Improve the ioctl extracter as well so we decode some more ones.
359 * compile fixes for Linux/mips
363 * Linux ia64 and hppa ports added
364 * The usual Linux syscall updates (includes 32bit uid/gid support),
365 * Linux ioctl list updated
366 * Support IPv6 scope ids
367 * FreeBSD/i386 port added
368 * UnixWare and Solaris updates
369 * Better support for tracing multithreaded processes in Linux
373 * Compiles on glibc2.0 systems again
374 * Linux/S390 port added
375 * The usual Linux syscall updates
376 * we can follow fork on arm now
380 * Linux/MIPS port added
381 * Lots of Linux updates again
382 * Improved IPv6 support
388 * Compiles on glibc2.0 systems again
392 * Get stat structure properly on Linux 64bit archs
393 * Personalities work again
394 * Compile correctly on SunOS again
400 * Linux (ultra)sparc fixes
407 * add support for more Linux architectures (powerpc, sparc, arm)
408 * support lots more Linux syscalls
409 * fix signal handling
410 * add IPX and IPIP support
411 * check stray syscall after execv
412 * fix hanging children
414 Changes in version 3.1
415 ======================
418 * Linux 68k is supported
419 * Linux alpha is supported
420 * configure is upgraded to autoconf 2.x
421 * using -f in combination with -e now works correctly
422 * output can be piped to a program
423 * tracing setuid programs works better
424 * it is now reasonable to install strace setuid to root in some circumstances
425 * new useful tracing names like file and process to trace whole
426 classes of system calls, e.g. -efile traces all system calls that
427 take a file name as an argument
428 * IPC calls on SunOS 4.1.x are decoded
429 * Linux program memory is reliably dereferenced
430 * Linux decodes at least the name of all syscalls as of pre2.0.4
431 * various cosmetic changes and bug fixes
433 Changes from versions 2.x to version 3.0
434 ========================================
436 * filename arguments are neither abbreviated nor stringified
437 * string arguments are now true C strings using octal instead of hex by default
438 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
439 * by default the output for multiple processes now goes into one file
440 * all structures, vectors, bitsets, etc. use consistent output formats
441 * the -c option now means count calls, -i does what the old -c used to do
443 New Features in version 3.0
444 ===========================
446 * non-ascii strings can be optionally printed entirely in hex
447 * the output format is readable when mutiple processes are generating output
448 * exit values are printed in an alignment column
449 * is is possible to suppress messages about attaching and detaching
450 * various tracing features can be enabled on a per syscall/signal/desc basis
451 * selective tracing of syscalls
452 * selective printing of syscall structures
453 * selective abbreviation of long structures on a per syscall basis
454 * selective printing of raw syscall arguments and results
455 * selective tracing of signals
456 * selective dumping of all I/O read from file descriptors
457 * selective dumping of all I/O written to file descriptors
458 * optional counting of time, calls, and errors for each syscall
projects / strace / blob